【The Playbirds】

Protip for Mozilla and The Playbirdsthe USA Network: In the future when you're plotting a tie-in for a show about vigilante hackers, maybe don't actually compromise people's privacy.

Some Firefox users were none too thrilled to discover that the web browser had installed an add-on called "Looking Glass" without permission. Bearing a description that read simply, in all-caps, "MY REALITY IS JUST DIFFERENT THAN YOURS," people were understandably suspicious.

(The all-caps utterance, it should be noted, is a quote from Lewis Carroll's Alice's Adventures in Wonderland.)

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That last tweet is from a Mozilla employee, in case it's not clear.

Looking Glass turned out to be a promotional tie-in for Mr. Robot, serving as the foundation for a new alternate reality game. But the initial lack of clarity as to its purpose, coupled with the fact that it installed unprompted, caused understandable alarm.

Once it became clear that users were unhappy, Mozilla moved quickly to set things right. The initial 1.0.3 version of the Firefox extension featured the cryptic Carroll quote and nothing else, as TechCrunch noted, but a subsequent 1.0.4 update included text explaining its purpose as an ARG.

Mozilla also created a support page to more thoroughly explain Looking Glass, and make it clear that users would have to opt in if they wanted to participate in the ARG. On top of that, the support page includes a vague mea culpathat lays out Mozilla's mission and commitment to giving people "more control over their lives online."

The Mr. Robotseries centers around the theme of online privacy and security. One of the 10 guiding principles of Mozilla's mission is that individuals' security and privacy on the internet are fundamental and must not be treated as optional. The more people know about what information they are sharing online, the more they can protect their privacy.

Mozilla exists to build the Internet as a public resource accessible to all because we believe open and free is better than closed and controlled. We build products like Firefox to give people more control over their lives online.

Looking Glass didn't self-install in every version of Firefox, and as the conversation around it grew, users began to figure out what happened. The extension is a product of Mozilla's Shield Studies program, which is a "user testing platform for proposed, new and existing features and ideas."

While some Shield Studies testing items prompt users for approval before installing, others are added automatically and require a manual opt-out. And, as some discovered, it's possible to participate in Shield Studies without specifically opting in (h/t Engadget).

Ultimately, Looking Glass doesn't actually do anything unless the user in question chooses to participate in the Mr. RobotARG. But this is a trust issue more than anything else. And with Mozilla's Firefox Quantum update freshly launched -- and vying to bring back users stolen away by Google Chrome -- this secretly added extension is not a good look.